in this work, some of the lattice plasmon quantum features are examined. Initially, the interaction of the far-field photonic mode and the nanoparticle plasmon mode is investigated. We probe the optical properties of the array plasmon that are dramatically affected by the array geometry. It is notable to mention that the original goal of this work is to examine the quantum feature of the array plasmon. For this reason, we consider a system containing array of the plasmonic nanoparticles and quantum dots. For a complete understanding, we analyze the system with the full quantum theory. Notably, the full quantum analyzing enables us to investigate the quantum fluctuation of the array field. Here, for instance, we study the second-order correlation function and report its modeling results.

In this paper, electromagnetically induced transparency (EIT) in a system consisting of associated arrays of parallel slabs (metal-dielectric-metal) is studied. The transmission coefficient, the reflection coefficient and the absorption coefficient as function of the incident light frequency by using the transfer matrix method is calculated and numerically discussed. Influence of the thickness of slab and the type of plasmonic metal on the induced transparency has been investigated. It is shown with decreasing the thickness of intermediate slab of length L2 (dielectric slab), the induced transparency increases due to the strong plasmon–plasmon couplings.

In this article, the excitation of optical states arising from plasmon-exciton coupling in bilayer nanoparticle structures is simulated and analyzed using the finite-difference time-domain method. Optical properties and Rabi splitting are examined through the extinction cross-section analysis of the nanoparticles. Given the sensitivity of the excitation energies of plasmonic and excitonic modes to structural parameters, such as nanoparticle size, this characteristic can be leveraged as a precise tool to tune the coupling strength and Rabi splitting between primary modes, enabling the creation of optimized new hybrid states. Due to the unique properties of gold and silver in supporting localized surface plasmons and the high oscillator strength of cyanine molecules in excitonic excitations, the coupling of these materials is evaluated. Results show that coupling gold and silver with cyanine can yield new plexcitonic states within the strong coupling regime. The emergence of multiple plexcitonic modes in the optical spectra holds broad potential applications in photonic sensors, optical switches, and quantum information processing.

Confinement of light at nanoscale dimensions in atomic plasmonic structures has many applications such as atomic line filters. In such coupled resonant systems, broad plasmonic resonance in contrast to narrow atomic resonance gives rise to a very fine filter in the reflection spectrum. In this paper, an atomic-plasmonic cell was modeled and fabricated and the reflection from a thin gold layer in the vicinity of the rubidium vapor in the Kretschmann configuration was measured by frequency modulation setup. By tuning the angle of incidence of light we could change the frequency of resonance of surface plasmon-polariton mode from the central frequency of atomic resonance lines, so the EIT to Fano resonance phenomena and vice versa have been observed. So, the EIT-like phenomena was introduced as an atomic line filter, controllable with a light entrance angle.

It has been shown that the overdense plasma in the resonance conditions can be totally transparent to the incident electromagnetic waves, due to the excitation of the surface modes or plasmons. This scenario requires excitation of a single surface mode which is provided by placing a dielectric layer in front of the incident wave. Here, it is shown that this procedure would be complete and more efficient by arranging the conditions to excite coupled surface modes, namely by placing two dielectrics on both sides of the plasma layer. The results show that in this case, the overdense plasma slab could poses high transmittance in spite of the presence of the dissipative effects. In addition, in this case, the resonance conditions can be achieved more easily and efficiently, and can be used for wider range of the overdense plasma widths.